如何在 Fragment 上启动 Zxing？

Question

我有一个 activity 包含两个片段，我想运行 ZXING 扫描器在其中一个片段上，

目前我在另一个 activity 上这样做 >

new IntentIntegrator(this).initiateScan(); // opens up Scan intent > ZXING

除了在片段上打开扫描，我该怎么做该行？

我在这样的接收器上也得到了 ZXING 结果 >

//results when activity enters a callback sent out to another activity
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {

如何将它们添加到我要运行 Zxing 的 Fragment 上？

THNX

Answer 1

how do i do that line but to open up the scan on a fragment ?

使用 getActivity() 在 IntentIntegrator 中传递 Context 为：

new IntentIntegrator(getActivity()).initiateScan();

how will i get them on my Fragment that i'm going to run Zxing on ?

在 Fragment 容器 Activity 中使用 super.onActivityResult(requestCode, resultCode, data); 行覆盖 onActivityResult，在 Fragment 中覆盖 onActivityResult 方法。

Answer 2

如果您确实需要在支持片段中打开它，您可以使用：

IntentIntegrator.forSupportFragment(MyFragment.this).initiateScan();

在你的片段中：

public void onActivityResult(int requestCode, int resultCode, Intent data) {
  IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data); 
  String barcode = result.getContents();
}

试试吧！

Answer 3

以下代码运行良好。 -

IntentIntegrator integrator = new IntentIntegrator(getActivity()) {
    @Override
    protected void startActivityForResult(Intent intent, int code) {
        EditorFragment.this.startActivityForResult(intent, 312); // REQUEST_CODE override
    }
};

然后你可以覆盖onActivityResult，一切正常。

更多信息 - here you go.

然后您可以将片段的 onActivityResult 称为

Fragment fragment = getSupportFragmentManager().findFragmentById(fragmentId);
    if(fragment instanceof ConsDetailUpdateFragment)
        ((ConsDetailUpdateFragment) fragment).onActivityResult(requestCode, resultCode, data);

Answer 4

第 1 步：在 build.gradle

中包含依赖项

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.journeyapps:zxing-android-embedded:3.5.0'
compile 'com.android.support:appcompat-v7:25.3.1'
testCompile 'junit:junit:4.12'

}

第二步：在OnCreateView中，点击一个按钮，启动二维码扫描

scan_button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            IntentIntegrator integrator = new IntentIntegrator(getActivity());
            integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
            integrator.setPrompt("Please focus the camera on the QR Code");
            integrator.setCameraId(0);
            integrator.setBeepEnabled(false);
            integrator.setBarcodeImageEnabled(false);
            integrator.initiateScan();
         }
    });

第 3 步：在父级中 activity

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
    IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
    if(scanResult != null){
        Toast.makeText(this, "  >>>>"+scanResult.toString(), Toast.LENGTH_LONG).show();
        Log.e(">>>>"," "+scanResult.getContents().toString());
    }
}

现在，二维码的解码内容出现在日志文件中，祝贺！

Answer 5

以上所有答案都是正确的，我想补充一下我是如何做到的。

第 1 步：

implementation 'com.journeyapps:zxing-android-embedded:3.2.0@aar'
implementation 'com.google.zxing:core:3.2.1'

第 2 步：在我的 activity

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // This is important, otherwise the result will not be passed to the fragment
    super.onActivityResult(requestCode, resultCode, data);
}

第 3 步：在我的片段中

requestCamera.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //Request camera
            IntentIntegrator integrator = IntentIntegrator.forSupportFragment(ScanFrag.this);
            integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
            integrator.setPrompt("Scan QR code");
            integrator.setCameraId(0);
            integrator.setBeepEnabled(true);
            integrator.setBarcodeImageEnabled(false);
            integrator.initiateScan();
        }
    });

然后我覆盖

 @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    IntentResult result = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
    if(requestCode == IntentIntegrator.REQUEST_CODE) {
        if (result != null) {
            if (result.getContents() == null) {
                Log.d("ScanFrag", "Cancelled scan");
                Toast.makeText(getContext(), "Cancelled", Toast.LENGTH_LONG).show();
            } else {
                Log.d("ScanFrag", "Scanned | " + result.getContents());
                Toast.makeText(getContext(), "Scanned: " + result.getContents(), Toast.LENGTH_LONG).show();
            }
        }
    }
}

希望它能帮助寻找如何从片段中使用 xzing 的人

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